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园林树木种类繁多,每个树种都有自己独特的形态、色彩、丰韵。这些特色又随季节及树龄的变化而有所丰富和发展。河西走廊地处荒漠和半荒漠区,初霜来临较早,秋季来临,各类林木开始落叶。一年之中,既有花团锦簇、梢头嫩绿,也有绿树成林,浓荫覆地,更少不了白雪挂枝、银装素裹,唯秋季景观相对单一。近年来我们进行了大量的引种试验,用以弥补这一不足,本文就此提出一些建议:1.植物选择:①秋季叶色变红者:火炬、山楂、花楸、地锦。②秋季叶色变黄者:白腊、杨、柳、落叶松、夏叶槭、鲜黄小蘖。③常年异色叶者:紫叶小蘖、洒金柏、紫叶李、紫叶桃。④双色叶者:银白杨、沙枣、沙棘。⑤观果植物:小蘖、枸子、山楂、苹果梨、苹果、枸杞、花楸、忍冬、葡萄、毛楝、金银花、李、丝棉木。⑥地被植物:秋菊、四季菊、早菊、一串红。2.叶色变化及果实的成熟物候
A wide variety of garden trees, each tree species has its own unique shape, color, and rhyme. These characteristics have been enriched and developed with changes in the season and age. The Hexi Corridor is located in a desert and semi-desert region. The early frost came early. In autumn, all kinds of trees begin to fall. During the year, there are both flowers, green shoots, green trees, shady lands, and less snow hanging branches, wrapped in snow, but the autumn landscape is relatively simple. In recent years, we have carried out a large number of introduction experiments to make up for this deficiency. This article puts forward some suggestions on this topic: 1. Plant selection: 1 The person who turns red in autumn leaves: torch, hawthorn, flower bud and brocade. 2 autumn leaves yellowing: white wax, poplar, willow, larch, summer leafhopper, fresh yellow peony. 3 perennial leaves of different colors: purple leaf small lotus root, sprinkle gold cypress, purple leaf plum, purple leaf peach. 4 double color leaf: silver poplar, sand date, sea buckthorn. 5 Fruiting plants: peony, gardenia, hawthorn, apple-pear, apple, alfalfa, calyx, honeysuckle, grape, ranunculus, honeysuckle, plum, silk cottonwood. 6 ground cover: autumn chrysanthemum, four seasons chrysanthemum, chrysanthemum, a string of red. 2. Change of leaf color and fruit ripening phenotype